Conclusion
Web services technology, although very much in its nascent stage, is all set to hit the mainstream enterprise computing.
Security concerns are taking challenging dimensions in this Web services-driven world. The basic concepts of enterprise security, although very relevant, are not directly applicable to Web services because of complex application-to-application interactions.
Standards and technologies are in the process of evolving; but the overall growth and development has been slowed down because of the difficulty in realizing vendor-neutral/platform-independent XML security standards.